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en.wikipedia.org/wiki/Pi

The number π is a mathematical constant. Originally defined as the ratio of a circle's circumference to its diameter, it now has various ...

www.exploratorium.edu/pi/history-of-pi

A Brief History of π Pi has been known for almost 4000 years—but even if we calculated the number of seconds in those 4000 years and calculated pi to that ...

www.pcworld.com/article/191389/a-brief-history-of-pi.html

Mar 13, 2013 ... In honor of Pi Day, we bring you a brief history of everyone's favorite irrational constant.

www.piday.org/learn-about-pi

History of Pi. By measuring circular objects, it has always turned out that a circle is a little more than 3 times its width around. In the Old Testament of the Bible (1 ...

www.math.rutgers.edu/~cherlin/History/Papers2000/wilson.html

The History of Pi. David Wilson History of Mathematics Rutgers, Spring 2000. Throughout the history of mathematics, one of the most enduring challenges has  ...

www.todayifoundout.com/index.php/2014/07/history-pi

Jul 24, 2014 ... That the ratio of the circumference of a circle to its diameter is constant has been known to humanity since ancient times; yet, even today, ...

gizmodo.com/a-brief-history-of-pi-1610160819

Jul 24, 2014 ... That the ratio of the circumference of a circle to its diameter is constant has been known to humanity since ancient times; yet, even today, ...

www.slate.com/articles/health_and_science/science/2014/03/pi_day_history_perfect_symmetry_a_mathematical_constant_wave_formulas_and.html

Mar 14, 2016 ... You may not realize it, but Pi Day is a real, nationally recognized ... In 2014, Joseph Mazur, author of Enlightening Symbols: A Short History of ...

www-history.mcs.st-and.ac.uk/HistTopics/Pi_through_the_ages.html

And he made a molten sea, ten cubits from the one brim to the other: it was round all about, and his height was five cubits: and a line of thirty cubits did compass ...